Revit Architecture into Archicad 14??

[rob2218]

we have a sub-consultant producing a highly articulate existing building conditions in a revit (RVT) architecture file.

I've tried to send them to the "add-on"'s Graphisoft page for them to download and install the Revit Add-on INT version (which I was told by Graphisoft that could be used with Revit Architecture) and when we get the IFC 2x3 formatted database back....well all hell breaks loose and the 2d information I see is impossible to work with.

I can't even place an elevation marker nor a section marker on the model we get back from them.

What do I need to tell them, do to get this resolved???

I've read the threads on this forum. I've consulted out local reseller and I've contacted Graphisoft directly, of which they want to physically "see" the RVT native file for their review once we have it in our possession.

Any advise is greatly appreciated.

[rob2218]

Ok, so for all you folks here's what happened to my IFC experience and hopefully this will help others.

1. Our Revit Architecture consultants sent us an IFC file.
2. the file size was about 60mb- large I hear for an IFC file to begin with.
3. we tried to "open" the IFC file in normal Archicad 14.
4. File opened, but when we struck sections or elevations to see the model in 2d, it would hang.....well, the GS guys told me that eventually it would produce the 2d linework...just not as quickly as we'd hoped for.
5. After GS investigated, they found various "IFC2x3******.gsm" objects.
6. After further investigation by GS, they were able to isolate 3 offending large gsm objects that were created by the IFC exporting out of Revit.
7. One GSM object within the embedded library was 170mb, the other was 80mb and a third object was 18mb.
8. after saving the GSM library to a library folder in my desktop, I was told to delete all the IFC gsm objects.
9. then I was told to sort out in that newly created folder, the gsm objects by size.
10. then was instructed to "delete" the 3 top largest gsm objects (170mb, 80mb, and the 18mb).
11. then to relink that very same library folder back into the file.

Once I did the above steps, the 2d elevations opened and 2d sections were able to be done.

Mind you though, the 3 offending gsm IFC imported objects were no longer in the file therefore certain elevations and sections didn't look correctly drawn because they were missing those particular objects.

But for the most part.....we are going to be able to use the file given to us by our subs.

There some doors that translated a little off as well. weren't really door intelligent objects rather just ojbects with no parameters.

So that concludes my IFC lesson for this month.

[Anonymous]

Typically we've found that the fastest system we can get our hands on, with high memory (i.e., 8GB++) is required to manipulate such files effectively. Even then, it's somewhat cumbersome. 80 MB is not a large IFC file. The shell for a project we've seen is 165MB, with the various "partial mode views" around 40 - 80 MB each. Opening times range from 1m29s up to 40m, depending upon the software being used.

[Eduardo Rolon]

There are some strange elements that explode in size during conversion and sometimes they are not important. For example one IFC file I worked with started in AC as a 155MB file for a 8 story parking structure. Removed Cars, Elevators, some handrails and parklines and the file dropped to 75MB. Removed Parking lines and Handrails on the only floor that I missed and the file dropped to 20MB.

[Erika Epstein]

In the round trip to/from IFC meshes become faceted. An example is the pillow on the bed made with the mesh tool, and this enlarges files considerably.

Depending on what you are doing, it can be fairly quick using F&S to replace the IFC'd elements with AC library parts although keep in mind associated dimensions etc.